/in/foo.cc: In function 'int timesCounter(char*, char*)':
/in/foo.cc:9:34: error: 'strlen' was not declared in this scope
     int length = (int)strlen(str2);
                                  ^
/in/foo.cc:11:37: error: 'strstr' was not declared in this scope
     while ((str1 = strstr(str1, str2))) {
                                     ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:23:30: error: 'strchr' was not declared in this scope
     if ((p = strchr(main,'\n')) != NULL)
                              ^
/in/foo.cc:25:31: error: 'strchr' was not declared in this scope
     if ((q = strchr(child,'\n')) != NULL)
                               ^